Downdraft sectional boiler.



E. M. BOSLBY DOWNDRAFT SBOTIIONAL BOILER. APPLICATION IILED'MAY 11, 1909.

954,417, Patented Apr. 12, 1910.

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Ema $2 E. M. BOSLBY. DOWNDRAFT SEGTIONAL BOILER.

APPLIOATTON FILED MAY 17, 1909.

Patented Apr. 12, 1910- 3 SIIBBTSSHBET 2.

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DOWNDRAFT SEGTIONAL BOILER,

APPLICATION FILED MAY 17,1909.

Patented Apr. 12, 1910.

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ran sra'rns PATENT OFFICE.

. ELIJ AH M. TBOSLEY, OF ST. LOUIS, MISSOURI.

DOWNDRAFT SECTIONAL BOILER.

To alt whom it'may concern: 1

Be it known that I, ELIJAH M. BOSLEY, a citizen of the United States, residing at St. Louis, Missouri, have invented a certain newand useful Improvement in Downdraft Sectional Boilers, of which the following is a full, clear, and exact description, such' a's will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to boilers, and par ticularly' to down-draft sectional boilers of the type described in my pending applica tion Serial No.138',582,- filed June 15, 1908.

One object of my resent invention is to provide a down-draft boiler composed of horizontally arranged sections and having a comparatively large unobstructed combustion chamber that communicates with a ver- .tical flue located adjacent the rear end of the boiler. v

Another object of my invention is to provide a down-draft boiler having a fuel hopper arranged above the grate, and means for holding the fuel away from the side walls of said hop or so that a draft will be created down trough the hopper, and also to prevent the fuel sticking to the side walls of Other objects desirable features of my invention wilh, e hereinafter pointed out. p

Figure 1 of the drawings is a vertical longitudinal sectional. View of a boiler constructed in accordance with myinvention; Fig.2 is a vertical transverse sectional view taken approximately on the line 22 of Fig. 1, lookingin the direction of the arrow;,Fig. 3 is a vertical transverse sectional view taken on approximately theline 33 of Fig. 1, looking in the direction indicated by the arrow; Fig.4 is a top plan view partly broken away to more clearly illufstrate the construction of the boiler; and. Fig. 5 is a detail sectional view showing the 1 means for establishing communication between the various sections of the boiler.

Referring to the drawings which illustrate the preferred form of my invention, 1 designates theintermediate horizontally arranged sections of my improved boiler, said sections being arranged one above the other. The base section 2, which preferably forms the ashpit of the boiler, is provided with a clean-out opening that is covered by a door 3, and the top section 4 of the boiler .is provided with a ma azine or .hopfper 5.

in which the fuel is placed. I 'pre erto Specification of Letters Patent.

Application filed May 17, 1909.

Patented Apr. 12, 1910. Serial No. 496,590.

arrange an auxiliary hopper 6 above the hopper 5, as shown in Fig. 1, and provide said auxiliary hopper with a door 7 that can be controlled by some suitable automatic draft-regulating mechanism, not shown. The section which is arranged immediately under the top section 4, is provided at its front end witha stoking door 8 that covers an opening through which the fuel can. be introduced onto the grate, and the rear wall of said section 15 provided with an opening '9 through which the products of combustion pass to a smoke-pipe 10.

The fuel grate is arranged adjacent the upper end of the boiler and is composed of a number of hollow grate-bars 11 that com mun'icatc with the hollow chambers of the section 12 through which the heating medium associates. I have herein shown the grate-bars 11 formed integral with the section 12 but I do not wish it to be understood walls and hollow front and rear walls, and

the sections that are arranged between the base section and the top section are provided with hollow transversely extending portions 13 arranged in vertical alinement witheach other so as to divide the inner space of the boiler into 'a combustion chamber A arranged under the fuel grate and a vertical flue B which establishes communication between said combustion chamber and the permit the'heating medium to circulate therethrough and thus provide a' large heating area, these hollow members 14 being ,ar-'

ranged inside of the vertical flue B so that they will' be in the path oft-ravel of the hot,

gases of combustion. By arranging these hollow members 14 inside-of a large vertical fiue thatis separate and distinct from the combustion chamber, I obtain a boiler that has a comparatively large and unobstructed of the hollow members 14, said openings being closed by movable caps 16. The various sections of the boiler are provided with lat erally projecting lugs 17' through ,which suitable fastening devices 18 pass toconnect the sections together, and communication between the hollow chambers of the variousing from the top section. The top section is 7 sections is established by means of slip nipples 19, as shown inFig. 5. The. base sec tion. is preferably provided with a hollow bottom, asshown in Fig. 1, through which the heating medium circulates, and-the in- .take pipe 20 is tapped into the rear endof said base section, the eduction pipe-21 leadso shaped that its lower. wall: forms the top of the vertical flue B, and the walls ofthe hopper 5 are preferably cast integral with said top section.

- As previously my present invention is to provide means for holding fuel away from the side walls of the fuel hopper so asto prevent the fuelfrom sticking to the hopper and also to enable a draft to. be created down through the hop per, and in theembodiment of myinvention herein shown, the means for accomplishing this consists of a plurality of inwardly proj ecting ribs 22 on the inside ofthe hopper 5, said ribs operating to hold the fuel away from the walls-of the hopper and thus permit air to travel downwardly'through said hopper to the-fuel on the grate. These ribs 22 "are preferably arranged vertically, as

shown in Fig. 1, and, as they arefcompara- -t-1vely narrow and extend some distance in-.

wardly "from the walls of the hopper they prevent the fuel from sticking to the hopper.

Either the door8 above the fuel grate or the door 7 inthe auxiliary hopper 6 canbe used for regulating the draft but I prefer to regulate'the draft by meansof the door 7. A

' grate the boiler of this construction is compact and has a large heating area, and as the hot gases of combustion travel downwardly through the fuel will not becomecoked' in the- The ribs 22 inside of the hopper hopper. insure a free draft to the fire and also reduce the liability of the fuel sticking to the hopper and the arrangement of the hollow members 14 in the manner herein shown roduces a very eflicient boiler having a com ustion chamber of such dimensions that the gases can explode freely.

' Having thus described my invention, what I, claim as new and desire to secure by Letters Patent is: a, v

'1. A down-draft boiler composed of a stated, one of the obj 'ectsof number of horizontally disposed superimposedsections having hollow front, rear and side walls through which a heatin .medium' circulates, a transverse vertical wa 1 that divides the inner space, of said boiler into a'combustion chamber and a vertical flue. that establishes communication between the lower end of saidtcombustionchamber'and a smoke-pipe, saidwall be'ingformedby integral portions of some'of, said sections arranged in vertical 'alinement with each other,

and a' fuelgrate arranged above, said combustion-chamberand ad acent the top of the" boiler.

2. A down draft boile'r composed of, a

number of horizontallyarranged superimposed sections having hollow side, front and rear walls, *some'of the intermediate sections having transversely extending integral 'hol- .lo'w portions that forma vertical divlding wall between the combustion chamber and a vertical fluewhichleads from the lower end of said combustion chamber, a'fu'el grate, means for creating a draft down through said fuel grate, and a smoke-pipe leading from the'upp'er end of'said flue.

3; A' down-draft boiler composed of a number of horizontally arranged sections having hollow front, side and rear walls through which the heating medium circulates, some of said sections Qhaving transversely extending hollow members arranged in vertical alinement with each other to form I a vertical wall which divides the inner space of the boiler into a combustioncha'mber and a vertical flue that communicates with the lower end of saidcombustionchamber, a

fuel grate arranged above said combustion" chamber, and hollow --members arranged in said vertical flue and communicating with the hollow spaces of. said sections through which the heating medium circulates.

4. Adown-draft boiler composed of ,a top section, a base section, and a plurality of horizontally arranged section's mounted one upon the other intermediate said base-section and top section, said intermediate sections having hollow front, rear 1 and side walls and also hollow transversely extending H portions that form a vertical division wall which separates a combustion chamber from a vertical flue, a hollow grate arranged above I the combustion chamber and communicating with the spaces of said sections through which the heating medium circulates, hollow members arranged in the-vertical flue-and communicating with the space ofsome of I said sections through which the heating medium-circulates, and means for creating. a draft down through the fuel grate.

vertical division wall that divides .125 5.'A down-draft boiler having a hollow from the lower end of said combustion chamber to a smoke-pipe, said wall being formed by transversely extending portions of said sections which are arranged in alinement With each other, a hollow fuel gratearranged above said combustion chamber and communicating with said division wall and the front wall of the boiler, 21 top section having a fuel hopper, and means for preventing the fuel from choking or clogging said hopper,

6. A down-draft boiler composed of honizontally arranged superimposed'sectionshaving hollow Walls through which the heating medium circulates and transversely extending portions which form a vertical division 'wall that divides the inner space of the boiler into a combustion chamber and a' vertical flue that leads from the lower end of said combustion chamber to a smoke-pipe, a hol- 1 low fuel grate arranged above said combustion chamber and communicating with said division wall and the front wall of the boiler, a top section having a fuel hopper, means for preventing the fuel from choking or clogging said hopper, and means for admitting air into the upper end of said hopper so that a draft will be created down through same.

7. A down draft boiler composed of a number of horizontally arranged superimposed sections having hollow front, rear and side walls and also transversely extending hollow members arranged in vvertical. alinement with each other to form a division wall between a combustion chamber and a vertical flue, hollow members in said fi'ue through which the heating medium. circulates, openings in one wall of said boiler through which a device can be inserted to clean off the material that collects, on said hollow members, and closures for said openin s.

in testimony whereof I hereunto affix my signature in the presence of two witnesses, this fifteenth day of May 1909.

I ELIJAH BOSLEY. \Vitnesses lYisLLs L. CHURoH, GEORGE BAKnWnLL. 

